diff --git a/requirements.txt b/requirements.txt
index 2f896d9..1cdfb5e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -81,7 +81,7 @@ more-itertools==4.1.0
 mpmath==1.0.0
 msgpack-python==0.5.6
 multipledispatch==0.5.0
-nbconvert==5.3.1
+nbconvert==6.5.1
 nbformat==4.4.0
 networkx==2.1
 nltk==3.3